Improvement in chain-pump buckets



` F. POTTER. Y CHAIN-PUMP BUCKET'S. No. 194,532.

vrammelAug."za,1s77.

N. PETERS, PHOTOL\YHOGRAPHER. WASHINGTONy D. C.

UNITED STATEs PATENT H OEEIcE.

FREDERICK POTTER, OF BEARDSTOWN, ILLINOIS.

IMPROVEMENT IN CHAIN-PUMP BUCKETS.

Specification forming part of Letters Patent No. 194,532, dated August28, 1877 application led May 15, 1877.

To all whom it may concern: I

Be it known that I, FREDERICK POTTER, of Beardstown, in the county ofCass, in the State of Illinois, have invented an Improvement on Bucketor Valve for Chain-Pump, patented by Frederick Potter and Wm. Webb,August 15, 1876, No. 181,202; and do hereby declare that the followingis a full, clear, and ex' act description thereof', reference being hadto the annexed drawings, making a part of this specification, in whichlike letters of reference refer to like parts, and in which- Fgure 1represents a vertical elevation Fig. 2, a vertical section.

This improvement consists in a stationary central stem made in onepiece, which threads or passes through a concave Washer at top andbottom of the elastic bucket, and formed of ductile iron or other metal,bent into eyes at one end after the bucket and washers are in place tohold the latter against the former. The neck of the stem, next to one ofthe eyes, may have a screw-thread around it, to Work inacorrespondingfemale thread in the adjoining Washer, by which theelastic bucket can be compressed and expanded circumt'crentially tocompensate-iu a Well-known mode-for wear against the tubing or pipe. Thescrew is placed at the upper extremity of the bucket, so that drainagemay take place through the opposite or lo Wer Washer.

Une of the forms in Which I construct this bucketlis as follows: Theelastic bucket A may be of a spheroidal, ovate, or globular shape, andis compressed between concave Washers G D by the Wire stem B, whichpasses vertically the common axis of said Washers and bucket A, and isbent immediately beyond each Washer into eyes b b to receive therespective links or chain connected with the adjacent buckets of thechain. The neck of the stem A, under one of the eyes b, is cut with athread, a, to work in the corresponding thread of the annexed Washer bywhich to compress the elastic bucket, when circumferential Wear ensuesto the latter by friction on the interior of the pump-tubing.

The advantages of this improvement are, that the plan simplifies theconstruction of a chain-pump bucket, four pieces only being used. and,While having the advantage of an adj usting-Washer with thread, is notliable to separation of the parts by the oxidation of saidthread-connection and consequent falling of the chain and buckets downthe reservoir, as is the case where one of the eyes b have athread-connection with its stem, or a combined eye and washer as anending for the stem, for

in the present case the washer would only become loose, leaving thebucket and stem intact.

What I claim as my invention is- 1. The stem B a b b bent at either endinto eyes b b-one eye atleast-after the bucketand Washers are in place,in combination With the bucket A and Washers C D, substantially as andfor the purposes described.

2. vThe combination, with stem B, provided with screw-Washer D at itsupper extremity, of WasherC, conh'ned on said stein bygbending said steminto an eye, b, substantially as and for the purposes described.

3. The combination of stein B b b a,witl1 Washers C D, substantially asand for the purposes described.

4. The combination, with bucket A and Washers G D, of the stem B b b a,applied and inserted and secured with the recurved eye b, substantiallyas and for the purposes described.

5. The combination and arrangement of the I bucket A, Washers O D, stemB, with thread a, and the finally-formed finishing-eye b, allVsubstantially as described.

Inltestimony that I claim the foregoing improvement in chain-pump bucketI have here` unto set my hand this 1st day of May, A. D. 1877.

FREDERICK POTTER.

Witnesses:

TEos. H. CARTER, CRAs. E. WYMAN.

